Flutter returns to the previous page and actively triggers a refresh

class PageOne extends StatefulWidget {
    
    
  @override
  _PageOneState createState() => new _PageOneState();
}

class _PageOneState extends State<PageOne> {
    
        // 第一个页面
  _getRequests()async{
    
      
        print('这里进行操作');
  }
  @override
  Widget build(BuildContext context) {
    
    
    return Scaffold(
      body: Center(
        child: RaisedButton(onPressed: ()=>
        Navigator.of(context).push(new MaterialPageRoute(builder: (_)=>PageTwo()),)
        .then((val)=>val?_getRequests():null), // 通过then进行监听回调参数
      ),
    ));
  }
}

class PageTwo extends StatelessWidget {
    
     // 第二个页面
  @override
  Widget build(BuildContext context) {
    
    
    //somewhere
    Navigator.pop(context,true); // 第二个就是需要传到参数
  }
}

Original link:
https://segmentfault.com/a/1190000039380091